Paying for a product and still waiting to receive it after 20 weeks

When buying a caravan, its a big decision and an expensive one. I bought a Gypsy Lite from Vrystaat Woonwaens back in April. I was told the Patio are made by order through Howling Moon and it could take up to 8 weeks for manufacturing. Currently its 20 weeks since the order was sent in (just under 5 months!!). I understand Covid is playing a role, however, saying that the manufacturer(Howling Moon) are unable to get zips and that is the cause of the delay is just absurd. I even contacted the bank to find out if I can get out of my contract and return the caravan. Currently I am paying for a product that I am unable to use..... Pathetic!! How can they not get zips from another supplier - it is clear that they are only using Covid as an excuse. I will gladly update this post, if there service warrants it going forward.